Looking at a guitar on ebay, seller has no idea of the brand, the label has japanese characters only, looks like some old s. yairi guitars I've seen, auction ends on saturday so hope there is someone able to translate the label
 http://www.ebay.co.uk/itm/260873669683? ... 500wt_1066
			
		

 (had to change my account by the way
 (had to change my account by the way  ) but I did manage to get a part translation of the label, it reads "Handmade for Mister ???? from Miki Watanabe". There is also a red hanko (stamp) on the label but from the photo it's nowhere near clear enough to make out the characters. I think the hanko would have probably denoted the brand but I guess I'll never know as I did'nt win the auction but it does look like a few S. Yairi's I've seen
 ) but I did manage to get a part translation of the label, it reads "Handmade for Mister ???? from Miki Watanabe". There is also a red hanko (stamp) on the label but from the photo it's nowhere near clear enough to make out the characters. I think the hanko would have probably denoted the brand but I guess I'll never know as I did'nt win the auction but it does look like a few S. Yairi's I've seen 